package com.shx.bill.interceptor;

import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String username = (String)request.getSession().getAttribute("username");
        // 已登录
        if (!StringUtils.isEmpty(username)) {
            return true;
        }
        request.setAttribute("msg", "没有权限, 请先登录");
        request.getRequestDispatcher("/index.html").forward(request, response);
        return false;
    }

}
